Police are investigating after two pedestrians were killed on a busy road have revealed the female victim may have been deliberately pushed in front of a vehicle.

The man and woman were knocked down and killed as they walked along the busy duel-carriageway the A47.

But it has now emerged that detectives are treating Sunday's incident at Terrington St John near King’s Lynn as suspicious.

Witnesses to the accident say the pair were walking hand in hand before they were hit.

As reported by the Eastern Daily Press, post mortem examinations showed the man died from severe head injuries while the woman suffered multiple injuries.

Detective Chief Inspector Paul Durham, from the Norfolk and Suffolk Major Investigation Team, said: “Although our investigation is in its early stages, initial enquiries have given me sufficient cause for concern that this was more than just a tragic accident.

“As a result I’m appealing to anyone who was in the area at the time and may have witnessed the collision – or seen the two pedestrians shortly before the collision - to come forward, no matter how insignificant the information may seem to them.”